Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface showing the new design; and,

FIG. 2 is a second embodiment thereof.

The broken line showing of the display screen and elements within the graphical user interface is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 